We are making an app whose primary purpose is to display data, but we want to do so in a rich way. Our design includes several custom controls.
For example, one control will be a wheel the user can spin to pick a time of day. You see an entire circle – a disk – that has time values going out like spokes from the center. It needs to spin around the center. So — it’s nothing like apple’s picker. It needs to animate nicely.
What library/framework would you recommend to do this? Quartz? OpenGL? Is there a 3rd party framework that people use that makes this kind of thing simpler?
Core Animation (i.e. CALayers) should be your first choice for animating objects that play nicely with UIKit. It has very good performance.